From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Performance graph for a Bensport petrol pump, plotting delivery rate against pump RPM under various float chamber configurations.
| Identifier | ExFiles\Box 27a\2\ Scan165 | |
| Date | 6th May 1933 | |
| GRAPH III BENSport PETROL PUMP - LEC 3417 TAP, FILTER, TANK, & PUMP AT SAME RELATIVE HEIGHTS & CONNECTED BY SAME LENGTHS & DIA (1/4") PIPES AS ON CHASSIS DELIVERY PIPE 5/16 DIA CONNECTED TO TWO S.U. FLOAT CHAMBERS AS ON ENGINE CAM STROKE .203" Y-Axis: DELIVERY PTS/HR X-Axis: PUMP RPM Legend: WITHOUT FLOATS & NEEDLES WITHOUT FLOATS FLOAT CHAMBERS COMPLETE BUT FLOATS SUNK FLOAT CHAMBERS COMPLETE 1/4 DIA DELIVERY PIPE, FLOATS SUNK | ||